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Just tried to upgrade my wordpress blog using the automatic upgrade function. It asks me to upgrade my database, and after I click the button all I get is a page with the wordpress logo, nothing else.

When I reload the page, it doesn't change anything. The URL is http://www.rhein-neckar-tango.de/wordpress/wp-admin/upgrade.php?step=1&backto=%2Fwordpress%2Fwp-admin%2F

If I try to access /wp-admin it redirects me to the "upgradee database" page, as if I never started the upgrade in the first place.

I can access the blog pages, but not the backend.

Steps taken so far:

  1. Upgrade started (no plugins deactivated) = Fail = Backend no longer accessible
  2. plugin directory renamed = started database upgrade = fail
  3. Manual upgrade via FTP upload according to instrctions on wp codex
  4. got up to database upgrade throwing an error (fields that it wants to add already exist, but there are no such fields in the database)

Which steps should I take to debug and solve this problem?

[Dirty fix] change wp_options/db_version to the one 3.5 uses. system seems to run.

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closed as too localized by anu, toscho Apr 4 '13 at 8:35

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

    
Try to deactivate your plugins before upgrading –  Mark Kaplun Dec 26 '12 at 14:25
1  
Please add debug information to your question to make answers possible. –  toscho Dec 26 '12 at 15:22

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